Looping through 3 arrays at the same time php

Question

A total noob question, but here I go:

I have 3 arrays (numbers, the alphabet and other characters), the usual.

I need to basically come up with code that will create a random password. And I have to have the 3 arrays... how do I loop through them to get a character from each? I'm confused, please someone point me to the right direction. Thanks

What do your arrays look like and what have you tried so far before we help you out? — Sudheesh Singanamalla, Feb 13 '18 at 17:31
$a1='0123456789'; $a2='%^*+~?!';$a3='abcdefghigklmnopqrstuvwxyz'; I tried array_merge but that didn't work, I tried concatenating them and then using the for and for each loops. — Anna Kurmanova, Feb 13 '18 at 17:34
Please edit your question with the 3 arrays and what you've tried so far along with sample output that you expect — Sudheesh Singanamalla, Feb 13 '18 at 17:36
Possible duplicate of [Two arrays in foreach loop](https://stackoverflow.com/questions/4480803/two-arrays-in-foreach-loop) — Kunal Pal, Feb 13 '18 at 17:52

ArsanGamal · Accepted Answer · 2018-02-13T18:18:23.383

So we will loop N times and pick out a rand value from each array you have

<?php
$length = 32; //length of random password 
$a1 = str_split('0123456789'); // convert to array
$a2 = str_split('%^*+~?!'); //convert to array
$a3 = str_split('abcdefghigklmnopqrstuvwxyz'); // convert to array

$result = ""; //final random password

for($i = 0; $i < $length; $i++){
    //choose random array from the three a1, a2, a3
    //then choose random value from the chosen array
    // note: array_rand is a built-in PHP function
    // that accepts an array as the first parameter
    // and number of random elements to pick out 
    // as a second optional parameter that defaults to 1
    $values = [$a1,$a2,$a3];
    $chosen = array_rand($values);

    $result .= $values[$chosen][array_rand($values[$chosen])];
}
 //print the result out
 echo $result;

?>

I hope this will help!

Ah! Such a simple solution and works perfectly, can't believe I haven't thought of doing it that way. Thank you so much — Anna Kurmanova, Feb 15 '18 at 05:47

Looping through 3 arrays at the same time php

1 Answers1